Dorothy Day was an American social activist and journalist, born on November 8, 1897, in Brooklyn, New York. She co-founded the Catholic Worker Movement in 1933, which aimed to promote social justice and provide assistance to the poor through hospitality houses and farms. Day's work emphasized the importance of community and the dignity of every individual. Throughout her life, Day advocated for nonviolence, labor rights, and the needs of the marginalized. She was influenced by her Catholic faith and the teachings of Saint Francis of Assisi. Dorothy Day passed away on November 29, 1980, leaving a lasting legacy in social justice movements.